WO2009093402A1 - 放送受信装置 - Google Patents
放送受信装置 Download PDFInfo
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- WO2009093402A1 WO2009093402A1 PCT/JP2008/073382 JP2008073382W WO2009093402A1 WO 2009093402 A1 WO2009093402 A1 WO 2009093402A1 JP 2008073382 W JP2008073382 W JP 2008073382W WO 2009093402 A1 WO2009093402 A1 WO 2009093402A1
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- 238000000034 method Methods 0.000 claims description 53
- 230000003321 amplification Effects 0.000 claims description 19
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 11
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000006866 deterioration Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 238000012937 correction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
- H03G3/3068—Circuits generating control signals for both R.F. and I.F. stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
Definitions
- the present invention relates to a broadcast receiving apparatus, and more particularly, to a broadcast receiving technique capable of satisfactorily receiving broadcast waves.
- FIG. 8 is a functional block diagram illustrating a partial configuration example centering on a tuner unit of a receiving apparatus including a general tuner.
- the RF input obtained from the antenna 101 is output to the demodulation circuit via the preamplifier 110, BPF 111, RFVGA 112, mixer 113, BPF 115, and IF amplifier 116 of the tuner unit 108.
- the mixer 113 is provided with an oscillator (OSC) 114.
- the output from the IF amplifier 116 also enters the level detector 125 and is fed back to the RFVGA 112 via the voltage control means 126.
- OSC oscillator
- an antenna whose frequency tuning can be adjusted by a matching circuit, a high-frequency circuit that amplifies and frequency-converts a high-frequency signal received by the antenna, and a digital that converts an analog received signal output from the high-frequency circuit into a digital signal Generates an antenna gain control signal based on received signal power or amplitude information in a reception system including a processing unit and a CPU for controlling the frequency tuning of the antenna by supplying a tuning control signal to the matching circuit The gain control signal is added to the tuning control signal.
- Patent Document 1 it is possible to receive a signal within a certain power range by a gain control signal, but measures are taken for a signal with very strong power or very weak power. Absent.
- a television receiver having a signal power increasing / decreasing unit that amplifies and attenuates signal power input to a tuner between an antenna and a tuner, based on an output signal from the tuner.
- a reception state detection unit that detects AGC, C / N, and BER, and feedback control of amplification or attenuation of the signal power in the signal power increase / decrease unit based on a detection result of the reception state detection unit
- a control unit that performs the operation.
- the signal power increasing / decreasing unit includes a switch unit that switches between an amplifier (amplifier) and an attenuator (attenuator), and the control unit has weak power based on the AGC and at least one of the C / N and BER. It is preferable to switch the switch unit to the amplifier side to amplify the signal when the reception state based on the above is deteriorated and to attenuate the switch unit to the attenuator side when the power is strong. .
- a counter unit for counting the reception state information detected by the reception state detection unit on each of the attenuation side and the amplification side is provided, and based on the reception state information , It is determined whether each channel is normally receivable, and when it is determined that each channel is normally receivable, the counter on either the attenuation side or the amplification side is counted up to perform channel search. At the end, it is preferable to compare the counter values and fix the switch so that more channels can be received normally.
- the television receiver includes a first and a second tuner having at least two or more tuners, and has a configuration in which an amplifier and an attenuator are provided in a splitter unit that distributes a signal to the tuner. Also good.
- the channel search is performed on the amplification side, the reception state information is acquired in each channel, and if reception is possible normally, the amplifier-side counter is counted up, and it is determined that “normal reception is not possible”, and , A flag storage unit that stores a re-search flag that is set to “1” when it is determined that the power is higher than the value of AGC, and after the channel search is completed, the re-search flag in the flag storage unit If "1", the processing may be continued by switching to the amplification side.
- the receiving side information (C / N, BER) is acquired on the amplification side and the attenuation side, and a storage unit for storing the setting conditions for improving the characteristics for each channel is provided.
- signal power may be increased or decreased based on information stored in the storage unit.
- the reception state information (AGC, C / N) is obtained by setting on the amplification side, and when AGC is less than or equal to the threshold value X and C / N is less than or equal to the threshold value Y, reception deterioration occurs due to strong power. Switching to the attenuation side, otherwise it may be left on the amplifier side.
- a television receiver can receive broadcasts well with respect to signal power in a wide range (from weak power to strong power).
- FIG. 1A is a diagram illustrating a configuration example of a broadcast receiving apparatus according to the first embodiment of the present invention.
- FIG. 1B is a diagram illustrating a configuration example of a double tuner type broadcast receiving apparatus. It is a flowchart figure which shows in detail the process which acquires the reception status information in each when it switches to each of Amp and ATT, searching one channel at a time.
- FIG. 3 is a flowchart showing a flow of processing based on an algorithm different from FIG. 2, that is, a second method for searching while acquiring information of Amp and ATT for each channel.
- FIG. 1A is a diagram illustrating a configuration example of a broadcast receiving apparatus according to the first embodiment of the present invention.
- FIG. 1B is a diagram illustrating a configuration example of a double tuner type broadcast receiving apparatus. It is a flowchart figure which shows in detail the process which acquires the reception status information in each when it switches to each of Amp and ATT, searching one channel at a time.
- FIG. 10 is a flowchart illustrating an example of a method of performing a search again on the ATT side when a “signal with strong power but cannot be received normally” is detected after performing an all-channel search on the Amp side.
- FIG. 10 is a diagram illustrating an example in which reception status information (C / N, BER) is acquired in two modes during channel search, and setting conditions with improved characteristics are stored for each channel in the second embodiment of the present invention. is there.
- It is a flowchart figure which shows the flow of the channel selection process by the 3rd Embodiment of this invention. It is a figure which shows the electric power range which can be received in the receiver by this Embodiment.
- It is a functional block diagram which shows the example of a partial structure centering on the tuner part of the receiver including a general tuner.
- FIG. 1A is a diagram showing a configuration example of a broadcast receiving apparatus according to the first embodiment of the present invention.
- the broadcast receiving apparatus alternatively includes an antenna 1, a band pass filter (BPF) BPF3, an attenuator (ATT) ATT5, and an amplifier (Amplifier) Amp7.
- Selector switch 9a, 9b that can be switched to, the following tuner unit 8, IF AGC17 that receives the output from the tuner unit 8, A / D converter 18, demodulator circuit 19, error correction circuit (Forward Error Correction)
- An FEC 20 and an IF AGC circuit 27 that receives the AGC output from the demodulation circuit 19 are provided, and the output is fed back to the IF AGC 17.
- a preamplifier 10 In order from the antenna 1 side, a preamplifier 10, a first band pass filter (Band Pass Filter) BPF 11, an RF (Radio Frequency) variable gain amplifier RFVGA 12, a mixer 13, a second band pass filter (Band Pass Filter) BPF 15 and IF (Intermediate Frequency) amplifier 16 are provided, and the output is input to IF AGC 17.
- the output of the IF amplifier 16 is also connected to the voltage control means 26, and the output is fed back to the RFVGA 12.
- the AGC output from the IF AGC 27, the CN estimated by the demodulation circuit 19, and the bit error rate (Bit Error ⁇ Rate) BER calculated from the FEC 20 are received state information detecting means. 31 to exchange data with the control means 32.
- the control means 32 is provided with a counter 32a, and switches the selector switches 9a and 9b based on the counter value. Further, the counter value and the like can be stored in the storage means 33.
- the reception state information (AGC, BER, C / N) is acquired by switching to the attenuator ATT5 side and the amplifier Amp7 side.
- a counter 32a for counting the number of receivable channels in each of the amplifier Amp7 and the attenuator ATT5 is provided.
- the video / audio is normally transmitted in the corresponding channel. It is determined whether or not reception is possible.
- the counter on the attenuator side or the amplifier side is incremented by one.
- the counters are compared and fixed so that more channels can be received normally. However, in the case of the same number, it is preferable to use the amplifier side. For example, counting is performed while scanning channels as follows.
- FIG. 2 is a flowchart showing in detail a process for acquiring reception state information when switching to Amp and ATT while searching one channel at a time, as an example of the above processing flow. It is. As shown in FIG. 2, first, a channel search is started in step S1, and in step S2, it is first switched to the Amp side. In this state, the frequency is set (tuned) to the tuner in step S3, and it is determined in step S3 ′ whether or not the tuning is successful. If successful (YES), the process proceeds to step S4. If unsuccessful (NO), the process proceeds to step S7.
- step S4 reception state information (AGC, BER, C / N) is acquired.
- step S5 it is determined whether normal reception is possible. For example, if C / N is 20 dB or more, or BER before Reed-Solomon correction after Viterbi decoding is 2.0 ⁇ 10 ⁇ 4 or less, it is determined that the reception state is normal. If it is determined that reception is normal (Yes), the process proceeds to step S6, 1 is added to the Amp-side counter, and the process proceeds to step S7. In the case of NO, the process proceeds to step S7 and is switched to the ATT side.
- step S8 reception state acquisition processing is performed in step S8, CN and BER are acquired, and based on these values, it is determined whether normal reception is possible in step S9. If the determination in step S9 is YES, 1 is added to the ATT counter in step S10 and the process proceeds to step S11. If NO, step S10 is skipped and the process proceeds to step S11. In step S11, it is determined whether or not the search has been completed (all channels have been searched). If NO, the process returns to step S2. If YES, the process proceeds to step S12, where the count number of the ATT counter is the Amp counter. It is determined whether the number is larger than the counter number.
- step S13 the switches 9a and 9b are fixed on the ATT side, and the process ends (step S15). If the number of ATT counters is not greater than the number of Amp counters (No), the process proceeds to step S14, the switches 9a and 9b are fixed on the Amp side, and the process ends (step S16). If the number is the same, fix it on the amplifier side.
- the reception status when switching to ATT and Amp for each channel is acquired, and the reception status can be improved by finally fixing to the one with a large number of channels with good reception status. Sexuality can be increased.
- FIG. 3 is a flowchart showing a flow of processing based on an algorithm different from that in FIG. 2, that is, a second method for searching while acquiring information of Amp and ATT for each channel.
- the search is started in step S21, and the switch is set to the Amp side in step S22.
- step S23 a frequency is set (tuned) to the tuner.
- step S24 the demodulation circuit 19 in FIG. 1 determines whether or not synchronization is established. If synchronization is not established (No), the process proceeds to step S29. If synchronization is established (Yes), the process proceeds to step S25, where reception state information is acquired.
- step S26 whether or not normal reception is possible is determined based on the values of CN and BER. If it is determined that the signal can be normally received (Yes), the process proceeds to step S27, and “1” is added to the Amp-side counter. In No, it progresses to Step S28 and detects AGC outputted from demodulation circuit 19. Since the AGC keeps the input signal level constant, information on the AGC control amount, that is, the amplification factor can be acquired. For example, if the AGC control amount operates in the range of 0 to 255, and the gain increases as the numerical value increases, that is, the input signal power is weak, if the AGC exceeds 35, the power is not strong (No) Proceed to step S33.
- step S29 For example, if AGC is 35 or less (Yes), it is determined as a strong electric field, set to the ATT side in step S29, reception state information is acquired in step S30, and whether or not normal reception is possible in step S31 is determined by CN, BER Determine based on. If it is determined that normal reception is possible (Yes), the process proceeds to step S32, and "1" is added to the ATT side. If it is determined that normal reception is not possible (No), the process proceeds to step S33.
- step S33 it is determined whether or not the search has been completed for all channels. If No, the process is continued from step S22 for the next channel. If it is determined in step S33 that the search has been completed (Yes), the process proceeds to step S34, and it is determined whether or not ATT counter number> Amp counter number. If Yes, the process proceeds to step S35, and the switch is fixed to the ATT side. If No, the switch is fixed to the Amp side (step S36), and the process ends (steps S37 and S38).
- FIG. 4 shows an example of a method for performing a search again on the ATT side when at least one or more “signals with strong power but cannot be received normally” are detected after an all-channel search on the Amp side. It is a flowchart figure.
- a search is started in step S41, and a switch is set on the Amp side in step S42.
- the re-search flag is used, and the re-search flag is initialized and set to FALSE.
- frequency setting tuning is performed in the tuner in step S44, and in step S45, it is determined whether or not synchronization has been achieved.
- step S46 acquires reception information, determines whether it can be received normally in step S47, and in the case of Yes, adds "1" to the Amp side counter in step S48, Proceed to step S49.
- step S50 AGC output from the demodulation circuit 19 is detected, for example, if AGC exceeds 35, it will not be strong power (No) and will progress to step S49. For example, if AGC is 35 or less (Yes), it is determined that this signal is high power and the reception state is deteriorated, and after setting the re-search flag to TRUE in step S51, the process proceeds to step S49.
- step S49 it is determined whether or not the search has been completed for all the channels. If No, the process returns to step S44 and the same processing is performed for the other channels. In the case of Yes, it progresses to step S52 and it is determined whether a re-search flag is TRUE. In the case of No, since it is determined that no signal is present in this reception environment for the “high power and reception state is degraded” signal, the switch is fixed on the Amp side in step S65. The process ends (step S66). In the case of Yes, it progresses to step S53, a switch is set to the ATT side, a channel selection is performed in step S54, and it is determined whether the synchronization was taken in step S55.
- step S56 When synchronization is established (Yes), the process proceeds to step S56, and reception state information is acquired. If synchronization cannot be established (No), the process proceeds to step S59. After receiving the reception state information in step S56, it is determined in step S57 whether or not reception is possible normally. In No, it progresses to Step S59. In the case of Yes, it progresses to step S58, "1" is added to an ATT side counter, and it progresses to step S59.
- step S59 it is determined whether or not all channel searches on the ATT side have been completed. If no, the process returns to step S54 and the same processing is performed for the other channels. In the case of Yes, it progresses to step S60 and it is determined whether it is ATT counter> Amp counter. In the case of Yes, the switch is fixed on the ATT side, and in the case of No, the switch is fixed on the Amp side, and the process is terminated (steps S63 and S64).
- one “re-search flag” is set in the device, channel search is first performed on the amplifier side, and reception status information (AGC, BER, C / N) is obtained for each channel. If reception is possible, the amplifier side counter is counted up. At this time, if it is determined that “normal reception is not possible” and it is determined that “it is high power” from the value of AGC, a “research flag” is set. If the “re-search flag” is set after the search is completed, the same processing is performed by switching to the amplifier side. In other words, after channel search on the amplifier side, the search is switched to the attenuator side only when there is a channel that "cannot receive normally" and "high power” even with one channel, so the processing amount is small. There is an advantage that the number of cases increases.
- FIG. 1B is a diagram illustrating a configuration example of a double (plurality) tuner-type broadcast receiving apparatus. Unlike FIG. 1A, in the configuration shown in FIG. 1B, in addition to the tuner unit 8, a second tuner unit 8a is provided.
- a second tuner unit 8a is provided in addition to the tuner unit 8.
- the double tuner configuration provided is more suitable when an amplifier and an attenuator are provided in the splitter section (within the splitter housing).
- an amplifier Amp and an attenuator ATT are provided in the splitter unit (within the casing of the splitter), and a splitter 6a is provided downstream of ATT5 and Amp7. Signals are input to the tuners 8 and 8a, respectively.
- the setting of the amplifier Amp / attenuator ATT affects both tuners, it is better to fix to either one than to switch the amplifier Amp / attenuator ATT for each reception channel.
- tuner 8 (for normal viewing) receives 13ch and tuner 8a (for recording output) )
- tuner 8a (for recording output)
- reception state information (C / N, BER) is acquired in the two modes 1) and 2) shown in FIG. As shown in B), it is stored for each channel (for example, 1), 2), 1).
- Mode 1 Amplifier Amp side Mode 2): Attenuator ATT side 13ch (Amp)-> 13ch (ATT)-> 14ch (Amp)-> 14ch (ATT)-> 15ch (Amp)-> 15ch (When searching for ATT)->...,
- the BER and C / N at the time of amplifier Amp and the BER and C / N at the time of attenuator ATT are acquired, and the better BER is stored for each channel. However, the BER converges to “0” if the signal quality is good to some extent, and converges to “1” if the signal quality is considerably deteriorated. In this case, the comparison is performed using C / N.
- select a channel set the attenuator and booster based on the saved information.
- Channel 13 is selected by channel search, and after tuning, C / N and BER are acquired (the same applies to channels 14 and after).
- C / N and BER are acquired (the same applies to channels 14 and after).
- AMP is enabled in 13ch.
- C / N since BER is good in mode 1), AMP is enabled in 13ch. However, if it cannot be determined by BER, it is determined by C / N.
- FIG. 5B a setting with better characteristics is saved for each channel in modes 1) and 2). Then, at the time of tuning, the table is referred to using the frequency as a parameter, and ATT and AMP are set.
- C / N and BER are acquired and stored only at the time of channel search, and in normal channel selection, ATT / Amp is set by referring to the information stored at the time of channel search. Therefore, as a merit, it is mentioned that it does not affect the tuning time of normal tuning. Disadvantages include a delay in channel search time (by the amount of BER acquisition), and information being updated only during channel search.
- FIG. 6 is a flowchart showing a flow of channel selection processing according to the present embodiment.
- processing is started in step S71, and a switch is set on the amplifier side in step S72.
- tuning processing is performed in step S73, and reception state information (AGC, C / N) is acquired in step S74.
- reception state information AGC, C / N
- step S75 it is determined whether or not AGC ⁇ threshold (high power). If No, the process ends in step S78.
- step S76 it is determined whether C / N ⁇ 20.0, that is, whether or not the deterioration has occurred. If not deteriorated (No), the process proceeds to step S78 and the process is terminated. If it has deteriorated (Yes), the process proceeds to step S77, and after switching to ATT, the process proceeds to step S78 and the process is terminated.
- reception status information AGC, C / N. If "AGC is less than threshold X and C / N is less than threshold Y", that is, reception degradation due to strong power If so, switch to the attenuator side. In other cases, it is left on the amplifier side.
- the criteria based on the values of AGC and C / N are as follows. In (strong power), when AGC ⁇ 35 ( ⁇ 30 dBm or more) and C / N ⁇ 20.0, the attenuator side of mode 2) is set. In other cases, the amplifier side is in mode 1). As an advantage of the present embodiment, since the latest AGC and C / N are used, optimum setting is possible. The disadvantage is that the channel selection time is extended in order to acquire AGC and CN.
- FIG. 7 is a diagram illustrating a power range in which reception is possible in the reception apparatus according to the present embodiment.
- the horizontal axis is the received power (dBm).
- R1 eg, ⁇ 60 to ⁇ 30 dBm
- R2 ⁇ 80 to 0 dBm
- the power range of R6 can be received when ATT is set, and the power range of R5 can be received when Amp is set.
- R3 and R4 ⁇ 90 to +10 dBm It can cover a wide range to the extent.
- the present invention can be used for a digital broadcast receiving apparatus.
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Abstract
Description
(1)図2は、上記処理の流れについてその一例として、1チャンネルずつサーチをしながら、AmpとATTとのそれぞれに切り替えた場合のそれぞれにおける受信状態情報を取得する処理を詳細に示すフローチャート図である。図2に示すように、まず、ステップS1においてチャンネルサーチが開始され、ステップS2において、まず、Amp側へ切り替える。この状態で、ステップS3においてチューナに周波数を設定(選局)し、ステップS3’において同調が成功したか否かを判定する。成功していれば(YES)ステップS4に進む。失敗の場合には(NO)ステップS7に進む。
モード2):アッテネータATT側の場合
13ch(Amp) -> 13ch(ATT) -> 14ch(Amp) -> 14ch(ATT) -> 15ch(Amp) -> 15ch(ATT) -> ……とサーチする場合に、アンプAmp時のBERとC/N、アッテネータATT時のBERとC/Nを取得し、BERの良い方をチャンネルごとに保存する。但し、BERは、ある程度信号品質が良ければ“0”、かなり劣化すれば“1”付近に収束し、比較ができないため、その場合はC/Nを用いて比較する。選局時は保存した情報をもとに、アッテネータ、ブースターの設定を行う。
Claims (8)
- アンテナとチューナとの間に、チューナに入力する信号電力を増幅及び減衰させる信号電力増減部を有するテレビジョン受信装置であって、
チューナからの出力信号に基づいて、AGCと、C/Nと、BERと、を検出する受信状態検出部と、
該受信状態検出部の検出結果に基づいて、当該チャンネルの信号が正常に受信可能か否かを判定し、その判定結果に応じて、前記信号電力増減部における前記信号電力の増幅又は減衰のフィードバック制御を行う制御部と
を有することを特徴とするテレビジョン受信装置。 - 前記信号電力増減部は、増幅器と減衰器とを切り替えるスイッチ部を有し、
前記制御部は、前記AGCに基づく電力が強く、かつ、前記C/NまたはBERの少なくともいずれかに基づく受信状態が劣化している場合には前記減衰側に前記スイッチ部を切替えて信号を減衰させ、前記電力が弱い場合、もしくは、前記C/NおよびBERのいずれに基づく受信状態も劣化していない場合には、前記増幅側へ前記スイッチ部を切替えて受信信号を増幅させることを特徴とする請求項1に記載のテレビジョン受信装置。 - チャンネルサーチにおいて、前記受信状態検出部において検出した受信状態情報を、前記減衰側と前記増幅側とのそれぞれにおいて受信可能なチャンネル数をカウントするためのカウンタ部を設け、
前記受信状態情報に基づいて、それぞれのチャンネルが正常に受信可能であるか否かを判定し、正常に受信可能であると判定された場合に、前記減衰側あるいは前記増幅側のいずれかのカウンタをカウントアップし、チャンネルサーチ終了時に、それぞれのカウンタ値を比較して、より多くのチャンネルが正常に受信可能となる方へ前記スイッチを固定することを特徴とする請求項1又は2に記載のテレビジョン受信装置。 - 前記テレビジョン受信装置は第1及び第2の少なくとも2以上のチューナを有する構成であり、前記チューナへの信号を分配するスプリッタ部に、アンプとアッテネータとが設けている構成を有していることを特徴とする請求項1から3までのいずれか1項に記載のテレビジョン受信装置。
- チャンネルサーチにおいて、前記スイッチ部を前記増幅側で受信したとき、前記受信状態検出部の検出結果により「正常に受信可能でない」と判断され、かつ、前記AGCの値より「強電力ではない」と判断された場合のみ、前記減衰側に切替えずに次のチャンネルに進むようにすることを特徴とする請求項3または4に記載のテレビジョン受信装置。
- 前記増幅側でチャンネルサーチを行い、各チャンネルで前記受信状態情報を取得し、正常に受信可能であれば前記アンプ側カウンタをカウントアップし、「正常に受信可能でない」と判断され、かつ、AGCの値より強電力であると判断された信号が少なくとも1チャンネル発生した場合に、“1”がたてられる再サーチフラグを記憶するフラグ記憶部を有し、
前記増幅側でのチャンネルサーチ完了後に、前記フラグ記憶部における前記再サーチフラグが“1”であれば、前記減衰側に切替えて同様のチャンネルサーチを行い、チャンネルサーチ終了後に、それぞれのカウンタ値を比較して、より多くのチャンネルが正常に受信可能となる方へ前記スイッチを固定することを特徴とする請求項1から4までのいずれかに記載のテレビジョン受信装置。 - チャンネルサーチ時に、増幅側と減衰側とで、C/N、BERを含む受信状態情報を取得し、増幅側あるいは減衰側のうち特性の良くなる設定条件をチャンネル毎に保存する記憶部を有し、
選局時に、前記記憶部に保存した情報に基づいて、信号電力の増減を行うことを特徴とする請求項1に記載のテレビジョン受信装置。 - 選局時に増幅側に設定して受信状態情報(AGC、C/N)を取得し、AGCが閾値X以下であり、かつ、C/Nが閾値Y以下の場合に、強電力で受信劣化していると判定し、減衰側へ切替え、それ以外の場合はアンプ側のままとすることを特徴とする請求項1に記載のテレビジョン受信装置。
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EP08871207.0A EP2246988B1 (en) | 2008-01-22 | 2008-12-24 | Broadcast receiver |
US12/863,927 US8619196B2 (en) | 2008-01-22 | 2008-12-24 | Broadcast receiver utilizing either signal amplification or signal attenuation |
CN200880125514.2A CN101919168B (zh) | 2008-01-22 | 2008-12-24 | 广播接收器 |
MX2010007762A MX2010007762A (es) | 2008-01-22 | 2008-12-24 | Receptor de difusion. |
BRPI0821886A BRPI0821886A8 (pt) | 2008-01-22 | 2008-12-24 | receptor de radiodifusão |
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JP2008011919A JP4514801B2 (ja) | 2008-01-22 | 2008-01-22 | 放送受信装置 |
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EP (1) | EP2246988B1 (ja) |
JP (1) | JP4514801B2 (ja) |
CN (1) | CN101919168B (ja) |
BR (1) | BRPI0821886A8 (ja) |
MX (1) | MX2010007762A (ja) |
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Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101469639B1 (ko) * | 2008-06-26 | 2014-12-08 | 엘지이노텍 주식회사 | 튜너의 채널 최적의 프리퀀시 교정 방법 |
JP4996643B2 (ja) * | 2009-03-27 | 2012-08-08 | シャープ株式会社 | 放送受信装置 |
JP4818439B2 (ja) * | 2010-01-15 | 2011-11-16 | 株式会社東芝 | 電子機器および受信チャンネルのプリセット方法 |
JP5554146B2 (ja) * | 2010-05-21 | 2014-07-23 | 三菱電機株式会社 | 放送受信装置 |
US8885106B2 (en) | 2013-03-13 | 2014-11-11 | Silicon Laboratories Inc. | Multi-tuner using interpolative dividers |
US8928820B2 (en) | 2013-03-13 | 2015-01-06 | Silcon Laboratories Inc. | Television tuner to capture a cable spectrum |
CA3054219A1 (en) * | 2018-09-07 | 2020-03-07 | Wilson Electronics, Llc. | Channelization options for reducing network sensitivity |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04326819A (ja) * | 1991-04-26 | 1992-11-16 | Sanyo Electric Co Ltd | ラジオ受信機 |
JP2001320286A (ja) * | 2000-05-02 | 2001-11-16 | Sharp Corp | 低速周波数ホッピング無線装置の電力制御方法 |
JP2002050976A (ja) * | 2000-08-07 | 2002-02-15 | Sony Corp | アンテナユニットおよび受信機 |
JP2004363854A (ja) | 2003-06-04 | 2004-12-24 | Mitsubishi Electric Corp | 受信システム |
JP2008010914A (ja) * | 2006-06-27 | 2008-01-17 | Matsushita Electric Ind Co Ltd | 無線通信装置 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0354443Y2 (ja) * | 1987-09-30 | 1991-12-02 | ||
KR0160687B1 (ko) * | 1994-04-29 | 1999-01-15 | 김광호 | 저잡음 증폭기를 갖는 영상신호 수신상치 |
US5907369A (en) * | 1996-09-10 | 1999-05-25 | Thomson Consumer Electronics, Inc. | Television system for displaying main and auxiliary images with color error correction provisions |
US6243430B1 (en) * | 1998-01-09 | 2001-06-05 | Qualcomm Incorporated | Noise cancellation circuit in a quadrature downconverter |
US6377315B1 (en) * | 1998-11-12 | 2002-04-23 | Broadcom Corporation | System and method for providing a low power receiver design |
US7710503B2 (en) * | 2000-09-25 | 2010-05-04 | Thomson Licensing | Apparatus and method for optimizing the level of RF signals based upon the information stored on a memory |
US20040036772A1 (en) * | 2001-09-25 | 2004-02-26 | Pugel Michael Anthony | Method for optimizing the level of rf signals by comparing quality of the rf signals under different operation modes |
US7327954B2 (en) * | 2002-05-31 | 2008-02-05 | Fujitsu Limited | Optical signaling to share active channel information |
MXPA05005989A (es) * | 2002-12-06 | 2005-08-18 | Thomson Licensing Sa | Reduccion de disipacion de energia del sintonizador en un modo de espera. |
JPWO2004071080A1 (ja) * | 2003-02-06 | 2006-06-01 | 松下電器産業株式会社 | アンテナ切換え装置及びその方法 |
US7701515B2 (en) * | 2004-02-13 | 2010-04-20 | Broadcom Corporation | Multi-input multi-output tuner front ends |
US7502587B2 (en) * | 2004-05-28 | 2009-03-10 | Echostar Technologies Corporation | Method and device for band translation |
RU43423U1 (ru) * | 2004-10-12 | 2005-01-10 | Общество с ограниченной ответственностью "ТЕЛЛУР" | Усилитель высокой частоты с автоматической регулировкой усиления |
ATE486459T1 (de) * | 2004-12-09 | 2010-11-15 | Harman Becker Automotive Sys | Mobiler hochfrequenzempfänger mit qualitätsabhängiger eingangssteuerung |
JP2007068143A (ja) * | 2005-08-05 | 2007-03-15 | Matsushita Electric Ind Co Ltd | アンテナ整合器とこれを用いた高周波受信装置 |
JP4760701B2 (ja) * | 2006-12-26 | 2011-08-31 | ソニー株式会社 | フロントエンド集積回路 |
US8902365B2 (en) * | 2007-03-14 | 2014-12-02 | Lance Greggain | Interference avoidance in a television receiver |
US8502920B2 (en) * | 2007-03-14 | 2013-08-06 | Vyacheslav Shyshkin | Method and apparatus for extracting a desired television signal from a wideband IF input |
-
2008
- 2008-01-22 JP JP2008011919A patent/JP4514801B2/ja not_active Expired - Fee Related
- 2008-12-24 MX MX2010007762A patent/MX2010007762A/es active IP Right Grant
- 2008-12-24 BR BRPI0821886A patent/BRPI0821886A8/pt not_active Application Discontinuation
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- 2008-12-24 EP EP08871207.0A patent/EP2246988B1/en not_active Not-in-force
- 2008-12-24 WO PCT/JP2008/073382 patent/WO2009093402A1/ja active Application Filing
- 2008-12-24 CN CN200880125514.2A patent/CN101919168B/zh not_active Expired - Fee Related
- 2008-12-24 RU RU2010134905/07A patent/RU2461965C2/ru not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04326819A (ja) * | 1991-04-26 | 1992-11-16 | Sanyo Electric Co Ltd | ラジオ受信機 |
JP2001320286A (ja) * | 2000-05-02 | 2001-11-16 | Sharp Corp | 低速周波数ホッピング無線装置の電力制御方法 |
JP2002050976A (ja) * | 2000-08-07 | 2002-02-15 | Sony Corp | アンテナユニットおよび受信機 |
JP2004363854A (ja) | 2003-06-04 | 2004-12-24 | Mitsubishi Electric Corp | 受信システム |
JP2008010914A (ja) * | 2006-06-27 | 2008-01-17 | Matsushita Electric Ind Co Ltd | 無線通信装置 |
Also Published As
Publication number | Publication date |
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EP2246988A1 (en) | 2010-11-03 |
RU2010134905A (ru) | 2012-02-27 |
BRPI0821886A2 (pt) | 2015-06-16 |
EP2246988A4 (en) | 2017-11-15 |
BRPI0821886A8 (pt) | 2018-10-30 |
JP4514801B2 (ja) | 2010-07-28 |
EP2246988B1 (en) | 2018-10-17 |
MX2010007762A (es) | 2010-08-11 |
JP2009177351A (ja) | 2009-08-06 |
US8619196B2 (en) | 2013-12-31 |
CN101919168B (zh) | 2014-08-27 |
CN101919168A (zh) | 2010-12-15 |
US20100289967A1 (en) | 2010-11-18 |
RU2461965C2 (ru) | 2012-09-20 |
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